FSG15N1A

## MICRO SWITCH Force Sensors Force Sensor 

## FS Series 

## **FEATURES** 

- Robust performance characteristics 

- Precision force sensing 

- Adaptable product design 

- Highly reliable 

- Signal conditioning available 

- Electrically ratiometric output 

- Extremely low deflection (30 microns typical @ Full Scale) 

- Low repeatability errors (± 0.2% Span) 

- Low linearity errors (± 0.5% Span) 

- Low off-center loading errors 

- Resolution to 1.0 gram force 

- Fast response time 

- Low power consumption 

- High ESD resistance - 10 KV 

## **TYPICAL APPLICATIONS** 

- Medical infusion pumps 

- Kidney dialysis machines 

- Robotic end-effectors 

- Variable tension control 

- Load and compression sensing 

- Contact sensing 

The FS Series Force Sensor provides precise, reliable force sensing performance in a compact commercial grade package. The sensor features a proven sensing technology that utilizes a specialized piezoresistive micro-machined silicon sensing element. The low power, unamplified, non-compensated Wheatstone bridge circuit design provides inherently stable mV outputs over the 1,500 gram force range. 

The force sensor operates on the principle that the resistance of silicon implanted piezoresistors will increase when the resistors flex under an applied force The sensor concentrates force from the application through the stainless steel plunger directly to the silicon sensing element. The amount of resistance changes in proportion to the amount of force being applied. This change in circuit resistance results in a corresponding mV output level. 

The sensor package design incorporates a patented modular construction. The use of innovative elastomeric technology and engineered molded plastics results in load capacities of 5.5 Kg overforce. The stainless steel plunger provides excellent mechanical stability and is adaptable to a variety of applications. Various electrical interconnects can accept pre-wired connectors, printed circuit board mounting, and surface mounting. The unique sensor design also provides a variety of mounting options including mounting brackets, as well as application-specific mounting requirements. 

Honeywell Sensing and Control 

FS Series 

## MICRO SWITCH Force Sensors Force Sensor 

## **PERFORMANCE CHARACTERISTICS @ 10 ± 0.01 VDC, 25°C** Preliminary, based on limited test data 

## **EXCITATION SCHEMATIC** 

|**Parameter**<br>Excitation*|**Min.**<br>|**Typ.**<br>10|**Max.**<br>12|**Units**<br>VDC||
|---|---|---|---|---|---|
|Null shift,25 to 0°,25 to 50°C<br><br>±0.5<br><br>mV<br>~~a~~|||||+|
|Null offset<br>-30<br>0<br>+30<br>mV<br>~~C2)~~||||||
|Linearity (BFSL)||±0.5||% Span||
|Sensitivity<br>Sensitivity shift<br>~~—_T_~~||0.24||mV/grf||
|25 to 0°,25 to 50°C||±5.0||% Span||
|Repeatability||±0.2||% Span|**FS SERIES CIRCUIT**|
|Response time|||1.0|msec|1. Circled numbers refer to sensor|
|Input resistance||5.0 K||ohms|terminals (pins). Pin 1 is|
|Output resistance<br>Plunger deflection<br>Weight<br>ESD (direct contact - terminals<br>andplunger)|<br><br><br>10|5.0 K<br>30<br>2.0<br>|<br><br><br>|ohms<br>microns<br>grams<br>kVolts|designated with a notch.<br>Pin 1 = Supply V<br>Pin 2 = Output, (+)<br>Pin 3 = Ground, (-)<br>Pin 4 = Output, (-)<br>2.The force sensor may be|



## **FS SERIES CIRCUIT** 

1. Circled numbers refer to sensor terminals (pins). Pin 1 is designated with a notch. Pin 1 = Supply VS (+) Pin 2 = Output, (+) Pin 3 = Ground, (-) Pin 4 = Output, (-) 

- 2.The force sensor may be powered by voltage or current. Maximum supply voltage is not to exceed 12 volts. Maximum supply current is not to exceed 1.6 mA. Power is applied across Pin 1 and Pin 3. 

* Non-compensated force sensors, excited by constant current (1.5 mA) instead of voltage, exhibit partial temperature compensation of Span. 

## **ENVIRONMENTAL SPECIFICATIONS** 

|Operatingtemperature<br>Storage temperature<br>Shock<br>Vibration|-40 to +85°C(-40 to +185°F)<br>-55 to +105°C(-67 to +221°F)<br>Qualification tested to 150g<br>Qualification tested to 0 to 2 kHz,20gsine|
|---|---|



- 3.The sensor output should be measured as a differential voltage across Pin 2 and Pin 4 (VO = V2 - V4). The output is ratiometric to the supply voltage. Shifts in supply voltage will cause shifts in output. Neither Pin 2 nor Pin 4 should be tied to ground or voltage supply. 

**Note** : All force related specifications are established using dead weight or compliant force. 

## **ORDER GUIDE** 

|**Catalog**<br>**Listing**<br>FSG-15N1A|**Force**<br>**Range**<br>**(grams)**<br>1,500|**Min.**<br>290|**Span, mV**<br>**Typ.**<br>360|**mV**|**Max.**<br>430|**Overforce**<br>**grams**<br>**Max.**<br>5,500|
|---|---|---|---|---|---|---|



## **APPLYING FORCE** 

## **MOUNTING** 

Evaluation of the sensor is to be performed using dead-weight or compliant force. Application of a rigid, immobile force will result in output drift (decrease) as elastomeric seals relax. Offcenter plunger loading has minimal effect on sensor performance and maintains operation within design specifications. 

The sensor output characteristics do not change with respect to mounting orientation. Care should be taken not to obstruct the vent hole in the bottom of the sensor housing. Improper venting may result in unstable output. 

Mounting bracket mounting torque: 2-5 in. lb. (,21-,56 Nm). 

**2** Honeywell Sensing and Control 

For application help: call 1-800-537-6945 

## MICRO SWITCH Force Sensors Force Sensor 

## FS Series 

## **MOUNTING DIMENSIONS** (for reference only) 

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12,7<br>.50<br>5,08<br>ø<br>.200<br>8,0<br>.31<br>3,1 NOTCH<br>.12 1,0 PIN 1<br>.04<br>0,5<br>.02<br>4 3 2 1<br>1,3<br>.05<br>9,0<br>.35<br>2,5 10,2 1,6<br>.10 .40 .06<br>**----- End of picture text -----**<br>


|**ACCESSORY**||
|---|---|
|**Catalog Listing**|**Description**|
|PC15132|Plastic mountingbracket|



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Honeywell Sensing and Control **3** 

For application help: call 1-800-537-6945 

## MICRO SWITCH Force Sensors Force Sensor 

## FS Series 

## **SALES AND SERVICE** 

Honeywell’s MICRO SWITCH Division serves its customers through a worldwide network of sales offices and distributors. For application assistance, current specifications, pricing or name of the nearest Authorized Distributor, contact a nearby sales office. Or call: 

1-800-537-6945 USA 1-416-293-8111 Canada 1-815-235-6847 International 

## **INTERNET** 

http://www.sensing.honeywell.com info@micro.honeywell.com 

Specifications may change without notice. The information we supply is believed to be accurate and reliable as of this printing. However, we assume no responsibility for its use. 

While we provide application assistance, personally and through our literature, it is up to the customer to determine the suitability of the product in the application. 

**Sensing & Control** Honeywell Inc. 11 West Spring Street Freeport, Illinois 61032 

_Helping You Control Your World_ 

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84-08028-0   796   Printed in USA